CN102664463A - Realization method for online control strategies of security control device with self-adaption running modes - Google Patents
Realization method for online control strategies of security control device with self-adaption running modes Download PDFInfo
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Abstract
The invention relates to a realization method for online control strategies of a security control device with self-adaption running modes. The method comprises the following steps of: automatically recognizing running modes through the security control device, and matching and checking with definite values of online strategies including a plurality of running modes obtained through calculation at a scheduling end; when the running mode changes and the scheduling end can not calculate in time and issue new online strategy, automatically matching the definite value of the online strategy running in the device according to the changed running mode by the device, and once new fault occurs, enabling the security control device to operate according to the definite value of the online strategy matched with the current running mode. By utilizing the method, the adaptability of the definite value of the online strategies of the security device to the running modes is improved.
Description
Technical field
The invention belongs to power system automatic field, relate more specifically to the adaptive peace control of a kind of operational mode device On-line Control strategy implementation method.
Background technology
Safety stabilization control system is the important component part that ensures power network safety operation, and the safety and stability control strategy then is the core of safety stabilization control system.Mode is calculated personnel or concurrent computational system according to research power network topology and ruuning situation; On a large amount of stability Calculation analytical calculation bases, the control strategy and the relevant information thereof of each forecast failure that calculates is stored in the historical data base with specific format.The control strategy table is as the main manifestation mode of safety and stability control strategy, and main contents comprise operational mode, failure mode, trend mode, these four types of information of control measure, specifically describes as follows:
(1) operational mode.Selected some electric network element (like unit, main transformer, circuit) is included the operational mode set in, and the state of each element representes that with Boolean putting into operation is " very ", and fault is stopped transport or maintenance is stopped transport is " vacation ".When wherein some or certain several elements stoppage in transit, think that promptly a kind of " element shut down condition " appears in electrical network.
(2) failure mode.Through specifying some element generation specified type faults respectively, construct forecast failure collection, for example, and line down tripping operation in the double loop, another loop line fault-free trip in the short time, or the section disconnection etc.
(3) trend mode.Selected some variable is included the tidal characteristics duration set in, for example, and the active power of circuit or section, the busbar voltage of load-center substation etc.The state of the characteristic quantity set that these variablees are formed has determined the system load flow mode.
(4) control measure.Mode calculates personnel or concurrent computational system provides the stable controlled quentity controlled variable to a certain forecast failure through calculating, for example, joins cutter group power, perhaps joins cutting load power etc.
At present; What at home and abroad electrical network was widely applied is the off-line control strategy table of formulating through offline mode, according to the forecast failure type under the various operational modes that possibly occur, draws under the various fault compound modes to keeping the needed control measure of system stability through calculated off-line; Analytic induction result of calculation; Arrangement generation strategy table leaves in the stabilization control device, searches coupling in order to peace control device and stablizes control measure.
The subject matter that adopts off-line control strategy table to exist is:
(1) because the control strategy table finite capacity of off-line design; Can not consider the all-network structure and the operational mode of actual electric network; Thereby can only be when design by section tidal current and more serious operational mode establishment Policy Table; In actual motion, occur bigger mistake probably and cut, economic performance is relatively poor.
The operational mode that occurs when (2) the control strategy table of off-line design is primarily aimed at normal the operation; And the power system operating mode after taking place in succession for multiple faults; Then there is mismatch phenomenon, causes stabilizing control system not play a role, thereby influence the safety and stability of operation of power networks.
Some accidents of having a power failure on a large scale have reflected that tradition can not adapt to the power system operating mode after multiple faults takes place in succession with " off-line decision-premaking; mate in real time " technology for the emergence control on basis both at home and abroad; Press for a kind of online peace control system based on " online decision-premaking, in real time coupling " technology.The operating condition of online peace control system timing acquiring operation electrical network; Regularly the computational analysis of forecast accident is carried out in (as 5 minutes); Search for given fault collection, that satisfy certain system stability margin value, the minimum control strategy of control cost fast; And be issued to on-the-spot peace control device, as the countermeasure in the next time period.In case fault takes place; On-the-spot peace control device moves by the strategy of on-line definite value of periodic refresh, compares with the way that adopts the off-line control strategy, under identical operational mode and failure mode; Through using the online trend mode definite value that refreshes; Can not cut or few cutter group or load, thereby improve the economical operation performance, can effectively avoid the generation of the accident of having a power failure on a large scale simultaneously.
Be to realize that the tactful definite value of peace control device upgrades, need to realize communicating by letter of peace control device and dispatching terminal.Communication modes can be taked the Ethernet mutual contact mode, and the network transmission protocol can adopt the TCP/IP transmission means.When concrete electrical network is used, integrated data network can be adopted, also the 2M designated lane can be selected.From Network Transmission reliability and rapidity requirement, preferred 2M designated lane.
Usually when online design peace control system; Only consider that dispatching terminal carries out in line computation, the residing operational mode of electrical network when being created on the line traffic control strategy; There is certain deficiency in this way: cause that when electrical network breaks down operational mode changes; Calculate because dispatching terminal need carry out strategy of on-line again according to fault triggering, and issue new strategy of on-line definite value; This process needs several minutes usually; In case and during this period of time new fault takes place in electrical network; To cause pacifying the operational mode that the control device can not mate with the strategy of on-line definite value when starting; Can only switch to off-line strategy definite value mode, move, thereby sacrifice the economy and the adaptability that adopt the strategy of on-line definite value to be brought according to the off-line strategy definite value that device is inner.
Summary of the invention
Above-mentionedly change in order to overcome in operational mode, dispatching terminal do not have enough time to calculate and issue new strategy of on-line as yet; Can only switch to this defective of off-line strategy definite value mode thereby cause device owing to lack the operational mode of coupling; The present invention proposes the adaptive peace control of a kind of operational mode device On-line Control strategy implementation method; Through the automatic identification of device to operational mode; And mate with the online strategy of on-line definite value that contains a plurality of operational modes that calculates of dispatching terminal; When the corresponding online strategy definite value that operational mode changes, device was moving in can be automatically according to the operational mode coalignment after changing when dispatching terminal did not have enough time to calculate and issue new strategy of on-line as yet; Improved the adaptability of strategy of on-line definite value, thereby can give full play to online peace control system in the effect that promotes aspect power grid security, reliable, the economical operation to operational mode.
The following technical scheme of the concrete employing of the present invention.
The adaptive peace control of a kind of operational mode device On-line Control strategy implementation method is characterized in that said method comprises the steps:
One, peace control device carries out power system operating mode according to information such as the line power that collects, pressing plate state, on off states and discerns automatically;
Two, peace control device is accepted the On-line Control strategy definite value that dispatching terminal calculates and issues at interval by setting cycle;
Three, peace control device is based on the automatic recognition result of current power system operating mode is tested to the On-line Control strategy definite value that receives; Promptly judge under current power system operating mode; Whether the electrical network parameter of peace control device collection satisfies the tactful effective term of being added in the On-line Control strategy definite value; When satisfying said tactful effective term, peace control device works in On-line Control strategy definite value mode, otherwise works in off-line control strategy definite value mode;
Four, when peace control device worked in On-line Control strategy definite value mode, if power system operating mode changes, dispatching terminal had new strategy of on-line definite value to issue simultaneously, then returns step 2; If power system operating mode changes; And peace control device does not receive new On-line Control strategy definite value as yet; Then device is discerned new operational mode automatically; And returning step 3, i.e. peace control device matees the On-line Control strategy definite value relevant portion that is using in the peace control device according to new power system operating mode recognition result, and tests and whether satisfy said tactful effective term;
Five, when peace control device works in On-line Control strategy definite value mode; When if the electrical network parameter of peace control device collection satisfies the operation condition in the On-line Control strategy definite value that current power system operating mode matees; Peace control device is by the On-line Control strategy definite value action of being mated with current power system operating mode; Otherwise, return step 1; At this moment, if dispatching terminal or be about to issue new On-line Control strategy definite value, then peace control device will suspend the reception process of On-line Control strategy definite value, after peace is controlled the device involution, accept the strategy of on-line definite value of dispatching terminal again;
Six, controlling the device basis when peace tests to the On-line Control strategy definite value that receives to the automatic recognition result of current power system operating mode; Do not satisfy tactful effective term; Peace control device runs on off-line control strategy definite value mode, if when the electrical network parameter of peace control device collection satisfies the operation condition in the off-line control strategy definite value that current power system operating mode matees, peace control device is by the off-line control strategy definite value action of being mated with current power system operating mode; Otherwise, return step 1.
In step 5; Peace control device suspends the way of strategy of on-line definite value reception process; The preferred employing by peace control device initiatively send device to start or the involution quantity of state on dispatching terminal; Notice dispatching terminal peace control device current state guarantees that peace control device internal microprocessor can less receive external disturbance when device action, thereby improves the reliability of device action.
Useful achievement of the present invention is through the automatic identification of peace control device to operational mode; And mate with the strategy of on-line definite value; Improved the adaptability of strategy of on-line definite value, thereby can better bring into play online peace control system in the effect that promotes aspect power grid security, reliable, the economical operation to operational mode.
Description of drawings
Fig. 1 is the adaptive peace control of an operational mode device control procedure sketch map;
Fig. 2 is double loop maintenance mode recognition logic figure;
Fig. 3 is that dispatching terminal is controlled the online peace control system schematic that device is formed with peace;
Fig. 4 is peace control device issues strategy of on-line definite value process when starting to dispatching terminal a processing mode.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Through of the automatic identification of peace control device to operational mode; Mate with the online strategy of on-line definite value that contains a plurality of operational modes that calculates of dispatching terminal, when the corresponding online strategy definite value that operational mode changes, device was moving in can be automatically according to the operational mode coalignment after changing when dispatching terminal did not have enough time to calculate and issue new strategy of on-line as yet.
The present invention with on the electrical network of North China all the online peace control of power plant device introduce as embodiment.When last all power plant-Chengde became 500kV double-circuit line generation " N-1 " fault, there was stable problem in 1 loop line road in addition, according to taking to excise all control measure of the corresponding unit of power plant.On all pacify the control device be responsible for connecting through the 2M mode with the control centre at the dispatching terminal of line computation, be used for sending measurement data, receive the strategy of on-line definite value simultaneously.
Fig. 1 is the adaptive peace control of an operational mode device control procedure sketch map.In conjunction with Fig. 1, the concrete design procedure of each link of the inventive method is following:
Step 1, peace control device carry out operational mode according to information such as the line power that collects, pressing plate state, on off states and discern automatically.
With certain 500kV double loop is example, and I loop line maintenance mode comprises two kinds of possibilities: the 1) scheduled overhaul of circuit; 2) circuit is because fault transfers this line maintenance mode to after tripping automatically.It is following that peace control device is discerned concrete logic to the self adaptation of this line maintenance mode:
1) scheduled overhaul of circuit
Distinguishing line tripping for the ease of device is because the manual operation of scheduled overhaul still because of the fault tripping, is provided with the line maintenance pressing plate especially.When scheduled overhaul, will overhaul the pressing plate input accordingly earlier, this moment, device then was identified as this line maintenance, transferred maintenance mode to, and no longer carried out the control logic relevant with this line.
2) line failure tripping operation
The line maintenance pressing plate under the input situation, when device identifies line tripping, is not then carried out relevant control logic, wait for device whole group involution (getting 5s usually) afterwards after, the switchover operation mode is this line maintenance mode again.
The combinational logic that foregoing description is corresponding is as shown in Figure 2.
The adaptive judgement of in the present embodiment circuit string being mended then confirms that based on " the string benefit drops into " pressing plate state of device collection the actual throwing of string benefit stops state; When " string is mended and dropped into " pressing plate input; The throwing of string benefit stops state and is " 1 "; And work as " go here and there to mend and drop into " when pressing plate withdraws from, the throwing of string benefit stops state and is " 0 ".
Step 2, peace control device are accepted the strategy of on-line definite value that dispatching terminal calculates and issues at interval by setting cycle.
Fig. 3 is that dispatching terminal is controlled the online peace control system schematic that device is formed with peace, calculates corresponding control strategies by dispatching terminal based on the method for operation and forecast failure, and is handed down to peace control device.
All hold in the power plant among the embodiment circuit string mend drop into, passage section normally moves, the operational mode that dispatching terminal is considered when line computation has comprised that string is mended and has withdrawed from this possible operation, the strategy of on-line definite value such as the table 1 of generation.
The table 1 peace control strategy of on-line definite value that device received
| The definite value title | Local show (MW) | A distant place shows (MW) |
| On hold string and mend to drop into the power low value | 2400 | 2400 |
| 3 machine mode low value cutter numbers | 0 | 0 |
| 4 machine mode low value cutter numbers | 1 | 1 |
| 5 machine mode low value cutter numbers | 2 | 2 |
| 6 machine mode low value cutter numbers | 3 | 3 |
| 7 machine mode low value cutter numbers | 0 | 0 |
| 8 machine mode low value cutter numbers | 0 | 0 |
| On hold string and mend to drop into the power intermediate value | 2800 | 2800 |
| 3 machine mode intermediate value cutter numbers | 1 | 1 |
| 4 machine mode intermediate value cutter numbers | 2 | 2 |
| 5 machine mode intermediate value cutter numbers | 3 | 3 |
| 6 machine mode intermediate value cutter numbers | 4 | 4 |
| 7 machine mode intermediate value cutter numbers | 0 | 0 |
| 8 machine mode intermediate value cutter numbers | 0 | 0 |
| On hold string and mend to drop into the high value of power | 3200 | 3200 |
| The high value of 3 machine modes cutter number | 2 | 2 |
| The high value of 4 machine modes cutter number | 3 | 3 |
| The high value of 5 machine modes cutter number | 4 | 4 |
| The high value of 6 machine modes cutter number | 5 | 5 |
| The high value of 7 machine modes cutter number | 0 | 0 |
| The definite value title | Local show (MW) | A distant place shows (MW) |
| The high value of 8 machine modes cutter number | 0 | 0 |
| On hold string and mend to drop into power limit | 3600 | 3600 |
| On hold string and reexamine and repair the power low value | 2000 | 2000 |
| 3 machine mode low value cutter numbers | 1 | 1 |
| 4 machine mode low value cutter numbers | 2 | 2 |
| 5 machine mode low value cutter numbers | 3 | 3 |
| 6 machine mode low value cutter numbers | 4 | 4 |
| 7 machine mode low value cutter numbers | 0 | 0 |
| 8 machine mode low value cutter numbers | 0 | 0 |
| On hold string and reexamine and repair the power intermediate value | 2400 | 2400 |
| 3 machine mode intermediate value cutter numbers | 2 | 2 |
| 4 machine mode intermediate value cutter numbers | 3 | 3 |
| 5 machine mode intermediate value cutter numbers | 4 | 4 |
| 6 machine mode intermediate value cutter numbers | 5 | 5 |
| 7 machine mode intermediate value cutter numbers | 0 | 0 |
| 8 machine mode intermediate value cutter numbers | 0 | 0 |
| On hold string and reexamine and repair the high value of power | 2800 | 2800 |
| The high value of 3 machine modes cutter number | 3 | 3 |
| The high value of 4 machine modes cutter number | 4 | 4 |
| The high value of 5 machine modes cutter number | 5 | 5 |
| The high value of 6 machine modes cutter number | 6 | 6 |
| The high value of 7 machine modes cutter number | 0 | 0 |
| The high value of 8 machine modes cutter number | 0 | 0 |
| On hold string and reexamine and repair power limit | 3200 | 3200 |
Step 3, peace control device are tested to the On-line Control strategy that receives according to current power system operating mode recognition result; And whether satisfy tactful effective term according to the On-line Control strategy, confirm that peace control device works in strategy of on-line definite value mode or off-line strategy definite value mode.
Judgement is under current power system operating mode; Whether the electrical network parameter basis of peace control device collection satisfies the tactful effective term of being added in the On-line Control strategy definite value; When satisfying said tactful effective term; Confirm peace control device work in On-line Control strategy definite value mode or, otherwise work in off-line control strategy definite value mode.
The tactful effective term of being added in the strategy of on-line definite value that peace control device receives preferably adopts the section power gear bound that embodies trend mode part in the strategy of on-line definite value as effective term.
In the present embodiment, peace control device based on current method of operation recognition result mend for string drop into, passage section normally moves, the section power that collects of device is 3100MW simultaneously, satisfies strategy of on-line effective term 2400MW～3600MW.Suppose that device works in off-line strategy definite value mode before receiving above-mentioned tactful definite value, then through the effective term check, satisfy tactful definite value validity, device switches to strategy of on-line definite value mode.
Step 4, when peace control device works in On-line Control strategy definite value mode, if power system operating mode changes, dispatching terminal has new strategy of on-line definite value to issue simultaneously, then returns step 2; If power system operating mode changes; And peace control device does not receive new On-line Control strategy definite value as yet; Then device is discerned new operational mode automatically; And returning step 3, i.e. peace control device matees the On-line Control strategy definite value relevant portion that is using in the peace control device according to new power system operating mode recognition result, and tests and whether satisfy said tactful effective term.
In the present embodiment; Because device has been in strategy of on-line definite value mode; Then install according to operational mode recognition result and for string mend withdrawing mode if going here and there to mend withdraws from operation this moment, and then corresponding strategy of on-line effective term is section power bracket 2000MW～3200MW.Actual profile power is 3100MW before the operation, if become 3150MW after the operation, still satisfies effective term, and therefore device still keeps strategy of on-line definite value mode.
Step 5, when peace control device works in On-line Control strategy definite value mode; When if the electrical network parameter of peace control device collection satisfies the operation condition in the On-line Control strategy definite value that current power system operating mode matees; Peace control device is by the On-line Control strategy definite value action of being mated with current power system operating mode; Otherwise, return step 1; At this moment, if dispatching terminal or be about to issue new On-line Control strategy definite value, then peace control device will suspend the reception process of On-line Control strategy definite value, after peace is controlled the device involution, accept the strategy of on-line definite value of dispatching terminal again.
In the present embodiment, issue strategy of on-line definite value processing mode such as Fig. 4 to dispatching terminal when peace control device is in starting state.When peace control device gets into starting state, send peace control device starting state amount (value is 1) to dispatching terminal; When peace is controlled device by the starting state involution, send peace control device starting state amount (value is 0) to dispatching terminal.
When peace control device starting state amount was 1, peace control device was not handled the strategy of on-line definite value association message that dispatching terminal issues, and dispatching terminal suspends the process that issues of strategy of on-line definite value simultaneously, reverted to 0 until peace control device starting state amount.
Step 6, when peace control device according to the automatic recognition result of current power system operating mode is tested to the On-line Control strategy definite value that receives; Do not satisfy tactful effective term; Peace control device runs on off-line control strategy definite value mode, if when the electrical network parameter of peace control device collection satisfies the operation condition in the off-line control strategy definite value that current power system operating mode matees, peace control device is by the off-line control strategy definite value action of being mated with current power system operating mode; Otherwise, return step 1.
In the present embodiment; Peace control device is mended for string according to current operational mode recognition result and is withdrawed from, passage section is normally moved; The section power that collects owing to load fluctuation reason device is 3250MW; And the strategy of on-line effective term is 2000MW～3200MW, does not satisfy tactful definite value validity when the strategy of on-line definite value is carried out the effective term check, and therefore device works in off-line strategy definite value mode.At this moment, in case electrical network breaks down, peace control device will move by mending the off-line control strategy definite value that withdrawing mode mated with current string.
Above embodiment passes through the automatic identification of device to operational mode in order to explanation the inventive method; Mate with the online strategy of on-line definite value that contains a plurality of operational modes that calculates of dispatching terminal; When the corresponding online strategy definite value that operational mode changes, device was moving in can be automatically according to the operational mode coalignment after changing when dispatching terminal did not have enough time to calculate and issue new strategy of on-line as yet; Improved the adaptability of strategy of on-line definite value, thereby can better bring into play online peace control system in the effect that promotes aspect power grid security, reliable, the economical operation to operational mode.
Claims (3)
1. the adaptive peace control of an operational mode device On-line Control strategy implementation method is characterized in that said method comprises the steps:
One, peace control device carries out power system operating mode according to the line power, pressing plate state, the on off state information that collect and discerns automatically;
Two, peace control device is accepted the On-line Control strategy definite value that dispatching terminal calculates and issues at interval by setting cycle;
Three, peace control device is based on the automatic recognition result of current power system operating mode is tested to the On-line Control strategy definite value that receives; Promptly judge under current power system operating mode; Whether the electrical network parameter of peace control device collection satisfies the tactful effective term of being added in the On-line Control strategy definite value; When satisfying said tactful effective term, peace control device works in On-line Control strategy definite value mode, otherwise works in off-line control strategy definite value mode;
Four, when peace control device worked in On-line Control strategy definite value mode, if power system operating mode changes, dispatching terminal had new strategy of on-line definite value to issue simultaneously, then returns step 2; If power system operating mode changes; And peace control device does not receive new On-line Control strategy definite value as yet; Then device is discerned new operational mode automatically; And returning step 3, i.e. peace control device matees the On-line Control strategy definite value relevant portion that is using in the peace control device according to new power system operating mode recognition result, and tests and whether satisfy said tactful effective term;
Five, when peace control device works in On-line Control strategy definite value mode; When if the electrical network parameter of peace control device collection satisfies the operation condition in the On-line Control strategy definite value that current power system operating mode matees; Peace control device is by the On-line Control strategy definite value action of being mated with current power system operating mode; Otherwise, return step 1; If dispatching terminal or be about to issue new On-line Control strategy definite value, then peace control device will suspend the reception process of On-line Control strategy definite value, after peace is controlled the device involution, accept the strategy of on-line definite value of dispatching terminal again;
Six, controlling the device basis when peace tests to the On-line Control strategy definite value that receives to the automatic recognition result of current power system operating mode; Do not satisfy tactful effective term; Peace control device runs on off-line control strategy definite value mode, if when the electrical network parameter of peace control device collection satisfies the operation condition in the off-line control strategy definite value that current power system operating mode matees, peace control device is by the off-line control strategy definite value action of being mated with current power system operating mode; Otherwise, return step 1.
2. the adaptive peace control of operational mode according to claim 1 device On-line Control strategy implementation method; It is characterized in that: in step 3; The tactful effective term of being added in the On-line Control strategy definite value that peace control device receives is employed in and embodies trend mode section power gear bound partly in the line traffic control strategy definite value as effective term.
3. the adaptive peace control of operational mode according to claim 1 device On-line Control strategy implementation method; It is characterized in that: in step 5; When peace control device suspends On-line Control strategy definite value reception process; Employing initiatively send peace control device to start or the involution quantity of state on dispatching terminal by peace control device; Notice dispatching terminal peace control device current state guarantees that peace control device internal microprocessor can less receive external disturbance when the peace control device action, thereby improves the reliability of peace control device action.
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| CN104659762A (en) * | 2014-11-14 | 2015-05-27 | 中国南方电网有限责任公司 | Optimal stability control method of cascading failures for double circuit lines |
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